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Tăluță C, Ștefănescu H, Crișan D. Seeing and Sensing the Hepatorenal Syndrome (HRS): The Growing Role of Ultrasound-Based Techniques as Non-Invasive Tools for the Diagnosis of HRS. Diagnostics (Basel) 2024; 14:938. [PMID: 38732353 PMCID: PMC11083774 DOI: 10.3390/diagnostics14090938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/23/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
More than half of patients hospitalized with liver cirrhosis are dealing with an episode of acute kidney injury; the most severe pattern is hepatorenal syndrome due to its negative prognosis. The main physiopathology mechanisms involve renal vasoconstriction and systemic inflammation. During the last decade, the definition of hepatorenal syndrome changed, but the validated criteria of diagnosis are still based on the serum creatinine level, which is a biomarker with multiple limitations. This is the reason why novel serum and urinary biomarkers have been intensively studied in recent years. Meanwhile, the imaging studies that use shear wave elastography are using renal stiffness as a surrogate for an early diagnosis. In this article, we focus on the physiopathology definition and highlight the novel tools used in the diagnosis of hepatorenal syndrome.
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Affiliation(s)
- Cornelia Tăluță
- Liver Unit, Regional Institute of Gastroenterology and Hepatology, 400162 Cluj-Napoca, Romania;
| | - Horia Ștefănescu
- Liver Unit, Regional Institute of Gastroenterology and Hepatology, 400162 Cluj-Napoca, Romania;
| | - Dana Crișan
- 5th Medical Clinic, Department of Internal Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 400139 Cluj-Napoca, Romania;
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Shelke V, Kale A, Sankrityayan H, Anders HJ, Gaikwad AB. Long non-coding RNAs as emerging regulators of miRNAs and epigenetics in diabetes-related chronic kidney disease. Arch Physiol Biochem 2024; 130:230-241. [PMID: 34986074 DOI: 10.1080/13813455.2021.2023580] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 12/22/2021] [Indexed: 01/19/2023]
Abstract
Diabetes is one of the major cause of chronic kidney disease (CKD), including "diabetic nephropathy," and is an increasingly prevalent accelerator of the progression of non-diabetic forms of CKD. The long non-coding RNAs (lncRNAs) have come into the limelight in the past few years as one of the emerging weapons against CKD in diabetes. Available data over the past few years demonstrate the interaction of lncRNAs with miRNAs and epigenetic machinery. Interestingly, the evolving data suggest that lncRNAs play a vital role in diabetes-associated CKD by regulation of epigenetic enzymes such as DNA methyltransferase, histone deacetylases, and histone methyltransferases. LncRNAs are also engaged in the regulation of several miRNAs in diabetic nephropathy. Hence this review will elaborate on the association between lncRNAs and their interaction with epigenetic regulators involved in different aspects and thus the progression of CKD in diabetes.
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Affiliation(s)
- Vishwadeep Shelke
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani, India
| | - Ajinath Kale
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani, India
| | - Himanshu Sankrityayan
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani, India
| | - Hans-Joachim Anders
- Division of Nephrology, Department of Internal Medicine IV, University Hospital of the Ludwig Maximilians University Munich, Munich, Germany
| | - Anil Bhanudas Gaikwad
- Laboratory of Molecular Pharmacology, Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani, India
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Schactler SA, Scheuerman SJ, Lius A, Altemeier WA, An D, Matula TJ, Mikula M, Kulecka M, Denisenko O, Mar D, Bomsztyk K. CryoGrid-PIXUL-RNA: high throughput RNA isolation platform for tissue transcript analysis. BMC Genomics 2023; 24:446. [PMID: 37553584 PMCID: PMC10408117 DOI: 10.1186/s12864-023-09527-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 07/20/2023] [Indexed: 08/10/2023] Open
Abstract
BACKGROUND Disease molecular complexity requires high throughput workflows to map disease pathways through analysis of vast tissue repositories. Great progress has been made in tissue multiomics analytical technologies. To match the high throughput of these advanced analytical platforms, we have previously developed a multipurpose 96-well microplate sonicator, PIXUL, that can be used in multiple workflows to extract analytes from cultured cells and tissue fragments for various downstream molecular assays. And yet, the sample preparation devices, such as PIXUL, along with the downstream multiomics analytical capabilities have not been fully exploited to interrogate tissues because storing and sampling of such biospecimens remain, in comparison, inefficient. RESULTS To mitigate this tissue interrogation bottleneck, we have developed a low-cost user-friendly system, CryoGrid, to catalog, cryostore and sample tissue fragments. TRIzol is widely used to isolate RNA but it is labor-intensive, hazardous, requires fume-hoods, and is an expensive reagent. Columns are also commonly used to extract RNA but they involve many steps, are prone to human errors, and are also expensive. Both TRIzol and column protocols use test tubes. We developed a microplate PIXUL-based TRIzol-free and column-free RNA isolation protocol that uses a buffer containing proteinase K (PK buffer). We have integrated the CryoGrid system with PIXUL-based PK buffer, TRIzol, and PureLink column methods to isolate RNA for gene-specific qPCR and genome-wide transcript analyses. CryoGrid-PIXUL, when integrated with either PK buffer, TRIzol or PureLink column RNA isolation protocols, yielded similar transcript profiles in frozen organs (brain, heart, kidney and liver) from a mouse model of sepsis. CONCLUSIONS RNA isolation using the CryoGrid-PIXUL system combined with the 96-well microplate PK buffer method offers an inexpensive user-friendly high throughput workflow to study transcriptional responses in tissues in health and disease as well as in therapeutic interventions.
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Affiliation(s)
- Scott A Schactler
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - Stephen J Scheuerman
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - Andrea Lius
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - William A Altemeier
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
- Center for Lung Biology, University of Washington, Seattle, WA, 98109, USA
| | - Dowon An
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
- Center for Lung Biology, University of Washington, Seattle, WA, 98109, USA
| | - Thomas J Matula
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, WA, 98195, USA
- Matchstick Technologies, Inc, Kirkland, WA, 98033, USA
| | - Michal Mikula
- Department of Genetics, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781, Warsaw, Poland
| | - Maria Kulecka
- Department of Genetics, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781, Warsaw, Poland
- Department of Gastroenterology, Hepatology and Clinical Oncology, Centre for Postgraduate Medical Education, 01-813, Warsaw, Poland
| | - Oleg Denisenko
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
| | - Daniel Mar
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - Karol Bomsztyk
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA.
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.
- Matchstick Technologies, Inc, Kirkland, WA, 98033, USA.
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Pantic I, Cumic J, Dugalic S, Petroianu GA, Corridon PR. Gray level co-occurrence matrix and wavelet analyses reveal discrete changes in proximal tubule cell nuclei after mild acute kidney injury. Sci Rep 2023; 13:4025. [PMID: 36899130 PMCID: PMC10006226 DOI: 10.1038/s41598-023-31205-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 03/08/2023] [Indexed: 03/12/2023] Open
Abstract
Acute kidney injury (AKI) relates to an abrupt reduction in renal function resulting from numerous conditions. Morbidity, mortality, and treatment costs related to AKI are relatively high. This condition is strongly associated with damage to proximal tubule cells (PTCs), generating distinct patterns of transcriptional and epigenetic alterations that result in structural changes in the nuclei of this epithelium. To this date, AKI-related nuclear chromatin redistribution in PTCs is poorly understood, and it is unclear whether changes in PTC chromatin patterns can be detected using conventional microscopy during mild AKI, which can progress to more debilitating forms of injury. In recent years, gray level co-occurrence matrix (GLCM) analysis and discrete wavelet transform (DWT) have emerged as potentially valuable methods for identifying discrete structural changes in nuclear chromatin architecture that are not visible during the conventional histopathological exam. Here we present findings indicating that GLCM and DWT methods can be successfully used in nephrology to detect subtle nuclear morphological alterations associated with mild tissue injury demonstrated in rodents by inducing a mild form of AKI through ischemia-reperfusion injury. Our results show that mild ischemic AKI is associated with the reduction of local textural homogeneity of PTC nuclei quantified by GLCM and the increase of nuclear structural heterogeneity indirectly assessed with DWT energy coefficients. This rodent model allowed us to show that mild ischemic AKI is associated with the significant reduction of textural homogeneity of PTC nuclei, indirectly assessed by GLCM indicators and DWT energy coefficients.
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Affiliation(s)
- Igor Pantic
- Faculty of Medicine, Department of Medical Physiology, Laboratory for Cellular Physiology, University of Belgrade, Visegradska 26/II, 11129, Belgrade, Serbia
- University of Haifa, 199 Abba Hushi Blvd, Mount Carmel, 3498838, Haifa, Israel
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE
| | - Jelena Cumic
- Faculty of Medicine, University of Belgrade, University Clinical Center of Serbia, Dr. Koste Todorovica 8, 11129, Belgrade, Serbia
| | - Stefan Dugalic
- Faculty of Medicine, University of Belgrade, University Clinical Center of Serbia, Dr. Koste Todorovica 8, 11129, Belgrade, Serbia
| | - Georg A Petroianu
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE
| | - Peter R Corridon
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE.
- Healthcare Engineering Innovation Center, Biomedical Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE.
- Center for Biotechnology, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE.
- Indiana Center for Biological Microscopy, Indiana University School of Medicine, Indianapolis, IN, USA.
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Hill C, Avila-Palencia I, Maxwell AP, Hunter RF, McKnight AJ. Harnessing the Full Potential of Multi-Omic Analyses to Advance the Study and Treatment of Chronic Kidney Disease. FRONTIERS IN NEPHROLOGY 2022; 2:923068. [PMID: 37674991 PMCID: PMC10479694 DOI: 10.3389/fneph.2022.923068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/30/2022] [Indexed: 09/08/2023]
Abstract
Chronic kidney disease (CKD) was the 12th leading cause of death globally in 2017 with the prevalence of CKD estimated at ~9%. Early detection and intervention for CKD may improve patient outcomes, but standard testing approaches even in developed countries do not facilitate identification of patients at high risk of developing CKD, nor those progressing to end-stage kidney disease (ESKD). Recent advances in CKD research are moving towards a more personalised approach for CKD. Heritability for CKD ranges from 30% to 75%, yet identified genetic risk factors account for only a small proportion of the inherited contribution to CKD. More in depth analysis of genomic sequencing data in large cohorts is revealing new genetic risk factors for common diagnoses of CKD and providing novel diagnoses for rare forms of CKD. Multi-omic approaches are now being harnessed to improve our understanding of CKD and explain some of the so-called 'missing heritability'. The most common omic analyses employed for CKD are genomics, epigenomics, transcriptomics, metabolomics, proteomics and phenomics. While each of these omics have been reviewed individually, considering integrated multi-omic analysis offers considerable scope to improve our understanding and treatment of CKD. This narrative review summarises current understanding of multi-omic research alongside recent experimental and analytical approaches, discusses current challenges and future perspectives, and offers new insights for CKD.
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Affiliation(s)
| | | | | | | | - Amy Jayne McKnight
- Centre for Public Health, Queen’s University Belfast, Belfast, United Kingdom
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Biochemical interaction of pyrvinium in gentamicin-induced acute kidney injury by modulating calcium dyshomeostasis and mitochondrial dysfunction. Chem Biol Interact 2022; 363:110020. [PMID: 35750223 DOI: 10.1016/j.cbi.2022.110020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 06/03/2022] [Accepted: 06/15/2022] [Indexed: 11/21/2022]
Abstract
Acute kidney injury (AKI) has a poor clinical prognosis and increases the risk of chronic kidney failure (CKD). It is a common complication of organ failure in hospitalised patients (10-15% of all hospitalizations) and in intensive care unit (ICU) patients, with an incidence of up to 50%. Concerning ICU, AKI has a mortality rate ranging from 27% to 35%, rising to 60%-65% when dialysis is needed, with roughly 5%-20% of survivors requiring dialysis on discharge. AKI is believed to cause over 7 million deaths per year worldwide. Currently, there is no treatment for AKI or its progression to CKD. When activated by AKI, numerous pathways have been suggested as possible contributors to CKD progression. Wnt/β-catenin is a crucial regulator of kidney development that increases following the injury. Despite the overwhelming evidence that Wnt/β-catenin promotes AKI, tubulointerstitial fibrosis, a hallmark of CKD progression, is also promoted by this pathway. The therapeutic potential of Wnt/β-catenin in the treatment of AKI and the progression from AKI to CKD is being studied. This hypothesis aims to determine whether the Wnt/β-catenin inhibitor pyrvinium has a beneficial effect on the renal dysfunction and damage caused by Gentamicin.
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Rajagopalan KS, Glasstetter LM, Zhu XY, Thaler R, Tang H, Jordan KL, Saadiq IM, Herrmann SM, Chade AR, Irazabal MV, Lerman LO, Eirin A. Renal Ischemia Induces Epigenetic Changes in Apoptotic, Proteolytic, and Mitochondrial Genes in Swine Scattered Tubular-like Cells. Cells 2022; 11:1803. [PMID: 35681498 PMCID: PMC9180447 DOI: 10.3390/cells11111803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/19/2022] [Accepted: 05/27/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Scattered tubular-like cells (STCs) are dedifferentiated renal tubular cells endowed with progenitor-like characteristics to repair injured parenchymal cells. STCs may be damaged and rendered ineffective by renal artery stenosis (RAS), but the underlying processes remain unclear. We hypothesized that RAS alters the epigenetic landscape on DNA and the ensuing gene transcriptional profile of swine STCs. METHODS CD24+/CD133+ STCs were isolated from pig kidneys after 10 weeks of RAS or sham (n = 3 each) and their whole 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) profiles were examined by 5mC and 5hmC immunoprecipitation sequencing (MeDIP-/hMeDIP-seq, respectively). A subsequent integrated (MeDIP/hMeDIP-seq/mRNA-seq) analysis was performed by comparing all online available gene sets using Gene Set Enrichment Analysis. Apoptosis, proteolysis, and mitochondrial structure and function were subsequently evaluated in vitro. RESULTS Differential expression (DE) analysis revealed 239 genes with higher and 236 with lower 5mC levels and 275 genes with higher and 315 with lower 5hmC levels in RAS-STCs compared to Normal-STCs (fold change ≥1.4 or ≤0.7, p ≤ 0.05). Integrated MeDIP-/hMeDIP-seq/mRNA-seq analysis identified several overlapping (DE-5mC/mRNA and DE-5hmC/mRNA levels) genes primarily implicated in apoptosis, proteolysis, and mitochondrial functions. Furthermore, RAS-STCs exhibited decreased apoptosis, mitochondrial matrix density, and ATP production, and increased intracellular amino acid concentration and ubiquitin expression. CONCLUSIONS Renal ischemia induces epigenetic changes in apoptosis-, proteolysis-, and mitochondria-related genes, which correlate with alterations in the transcriptomic profile and corresponding function of swine STCs. These observations may contribute to developing novel targeted interventions to preserve the reparative potency of STCs in renal disease.
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Affiliation(s)
- Kamalnath S. Rajagopalan
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Logan M. Glasstetter
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Xiang-Yang Zhu
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Roman Thaler
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55901, USA;
| | - Hui Tang
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Kyra L. Jordan
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Ishran M. Saadiq
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Sandra M. Herrmann
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Alejandro R. Chade
- Department of Physiology and Biophysics, Medicine and Radiology, University of Mississippi Medical Center, Jackson, MS 55901, USA;
| | - Maria V. Irazabal
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Lilach O. Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
| | - Alfonso Eirin
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55901, USA; (K.S.R.); (L.M.G.); (X.-Y.Z.); (H.T.); (K.L.J.); (I.M.S.); (S.M.H.); (M.V.I.); (L.O.L.)
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Akram F, Sahreen S, Aamir F, Haq IU, Malik K, Imtiaz M, Naseem W, Nasir N, Waheed HM. An Insight into Modern Targeted Genome-Editing Technologies with a Special Focus on CRISPR/Cas9 and its Applications. Mol Biotechnol 2022; 65:227-242. [PMID: 35474409 PMCID: PMC9041284 DOI: 10.1007/s12033-022-00501-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 04/13/2022] [Indexed: 01/18/2023]
Abstract
Genome-editing technology has enabled scientists to make changes in model organisms' DNA at the genomic level to get biotechnologically important products from them. Most commonly employed technologies for this purpose are transcription activator like effector nucleases (TALENs), homing-endonucleases or meganucleases, zinc finger nucleases (ZFNs), and clustered regularly interspaced short palindromic repeats (CRISPR) associated protein 9 (Cas9). Among these tools, CRISPR/Cas9 is most preferred because it's easy to use, has a small mutation rate, has great effectiveness, low cost of development, and decreased rate of advancement. CRISPR/Cas9 has a lot of applications in plants, animals, humans, and microbes. It also has applications in many fields such as horticulture, cancer, food biotechnology, and targeted human genome treatments. CRISPR technology has shown great potential for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic to provide early and easy detection methods, possible treatment, and vaccine development. In the present review, genome-editing tools with their basic assembly and features have been discussed. Exceptional notice has been paid to CRISPR technology on basis of its structure and significant applications in humans, plants, animals, and microbes such as bacteria, viruses, and fungi. The review has also shed a little light on current CRISPR challenges and future perspectives.
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Affiliation(s)
- Fatima Akram
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
| | - Sania Sahreen
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
| | - Farheen Aamir
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
| | - Ikram ul Haq
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan ,Pakistan Academy of Sciences, Islamabad, Pakistan
| | - Kausar Malik
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Memoona Imtiaz
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
| | - Waqas Naseem
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
| | - Narmeen Nasir
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
| | - Hafiza Mariam Waheed
- Institute of Industrial Biotechnology, Government College University, Lahore, 54000 Pakistan
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Ahmed RF, Okasha AM, Hafiz SHI, Abdel-Gaber SA, Yousef RKM, Sedik WF. Guanosine protects against glycerol-induced acute kidney injury via up-regulation of the klotho gene. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2022; 25:399-404. [PMID: 35656176 PMCID: PMC9148399 DOI: 10.22038/ijbms.2022.60579.13428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 03/09/2022] [Indexed: 12/02/2022]
Abstract
Objectives Acute Kidney Injury (AKI) is characterized by a rapid and reversible decline in renal function with a rapid decrease in Glomerular Filtration Rate (GFR), which is associated with high mortality. Rhabdomyolysis accounts for 10-40% of AKI, to which the therapeutic approach is limited. Klotho is a protein that modulates sodium-phosphate co-transporters, ion channels that have been reported to have a renal protective effect. Guanosine, a purine nucleoside, has already been reported to have a renal protective effect; however, the mechanism of such protection and its relation to Klotho modification has not been evaluated yet. This study aims to evaluate the mechanism of the protective effect of guanosine against rhabdomyolysis-induced AKI and its relation to the expression of the Klotho gene. Materials and Methods In the current study, rats were divided into three groups: control, glycerol-induced AKI, and guanosine-treated. Serum urea and creatinine levels, renal tissue Total Antioxidant Capacity (TAC), and Klotho and Cystatin C genes expression were evaluated. Furthermore, caspase-3 immunostaining and histopathological evaluations were done. Results Results showed that guanosine treatment resulted in a significant reduction in serum urea and creatinine, Cystatin C genes expression, and caspase-3 immunoexpression, and an increase in TAC and Klotho genes expression. Results also revealed an improvement of renal histopathology when compared with the glycerol-induced AKI group. Conclusion Guanosine may be a promising agent in the treatment of rhabdomyolysis-induced AKI. The proposed mechanism for guanosine may be through its ability to enhance Klotho gene expression in renal tissue, with subsequent antioxidant and anti-apoptotic activity.
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Affiliation(s)
- Rasha F. Ahmed
- Department of Medical Biochemistry, Faculty of Medicine, Minia University, 61511, Minia, Egypt
| | - Ahmed M. Okasha
- Department of Medical Biochemistry, Faculty of Medicine, Minia University, 61511, Minia, Egypt
| | | | - Seham A. Abdel-Gaber
- Department of Pharmacology, Faculty of Medicine, Minia University, 61511, Minia, Egypt
| | | | - Wael F Sedik
- Department of Medical Biochemistry, Faculty of Medicine, Minia University, 61511, Minia, Egypt
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Tanemoto F, Mimura I. Therapies Targeting Epigenetic Alterations in Acute Kidney Injury-to-Chronic Kidney Disease Transition. Pharmaceuticals (Basel) 2022; 15:ph15020123. [PMID: 35215236 PMCID: PMC8877070 DOI: 10.3390/ph15020123] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/15/2022] [Accepted: 01/18/2022] [Indexed: 12/04/2022] Open
Abstract
Acute kidney injury (AKI) was previously thought to be a merely transient event; however, recent epidemiological evidence supports the existence of a causal relationship between AKI episodes and subsequent progression to chronic kidney disease (CKD). Although the pathophysiology of this AKI-to-CKD transition is not fully understood, it is mediated by the interplay among multiple components of the kidney including tubular epithelial cells, endothelial cells, pericytes, inflammatory cells, and myofibroblasts. Epigenetic alterations including histone modification, DNA methylation, non-coding RNAs, and chromatin conformational changes, are also expected to be largely involved in the pathophysiology as a “memory” of the initial injury that can persist and predispose to chronic progression of fibrosis. Each epigenetic modification has a great potential as a therapeutic target of AKI-to-CKD transition; timely and target-specific epigenetic interventions to the various temporal stages of AKI-to-CKD transition will be the key to future therapeutic applications in clinical practice. This review elaborates on the latest knowledge of each mechanism and the currently available therapeutic agents that target epigenetic modification in the context of AKI-to-CKD transition. Further studies will elucidate more detailed mechanisms and novel therapeutic targets of AKI-to-CKD transition.
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11
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Majumder S, Pushpakumar S, Juin SK, Jala VR, Sen U. Toll-like receptor 4 mutation protects the kidney from Ang-II-induced hypertensive injury. Pharmacol Res 2022; 175:106030. [PMID: 34896544 PMCID: PMC8755630 DOI: 10.1016/j.phrs.2021.106030] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 01/03/2023]
Abstract
Cellular autophagy is a protective mechanism where cells degrade damaged organelles to maintain intracellular homeostasis. Apoptosis, on the other hand, is considered as programmed cell death. Interestingly, autophagy inhibits apoptosis by degrading apoptosis regulators. In hypertension, an imbalance of autophagy and apoptosis regulators can lead to renal injury and dysfunction. Previously, we have reported that toll-like receptor 4 (TLR4) mutant mice are protective against renal damage, in part, due to reduced oxidative stress and inflammation. However, the detailed mechanism remained elusive. In this study, we tested the hypothesis of whether TLR4 mutation reduces Ang-II-induced renal injury by inciting autophagy and suppressing apoptosis in the hypertensive kidney. Male mice with normal TLR4 expression (TLR4N, C3H/HeOuJ) and mutant TLR4 (TLR4M, C3H/HeJLps-d) aged 10-12 weeks were infused with Ang-II (1000 ng/kg/d) for 4 weeks to create hypertension. Saline infused appropriate control were used. Blood pressure was increased along with increased TLR4 expression in TLR4N mice receiving Ang-II compared to TLR4N control. Autophagy was downregulated, and apoptosis was upregulated in TLR4N mice treated with Ang-II. Also, kidney injury markers plasma lipocalin-2 (LCN2) and kidney injury molecule 1 (KIM-1) were upregulated in TLR4N mice treated with Ang-II. Besides, increased nuclear translocation and activity of NF-kB were measured in Ang-II-treated TLR4N mice. TLR4M mice remained protected against all these insults in hypertension. Together, these results suggest that Ang-II-induced TLR4 activation suppresses autophagy, induces apoptosis and kidney injury through in part by activating NF-kB signaling, and TLR4 mutation protects the kidney from Ang-II-induced hypertensive injury.
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Affiliation(s)
- Suravi Majumder
- Department of Internal Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Sathnur Pushpakumar
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Subir K Juin
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Venkatakrishna R Jala
- Department of Microbiology and Immunology, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Utpal Sen
- Department of Physiology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
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12
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Seibold T, Schönfelder J, Weeber F, Lechel A, Armacki M, Waldenmaier M, Wille C, Palmer A, Halbgebauer R, Karasu E, Huber‐Lang M, Kalbitz M, Radermacher P, Paschke S, Seufferlein T, Eiseler T. Small Extracellular Vesicles Propagate the Inflammatory Response After Trauma. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2102381. [PMID: 34713625 PMCID: PMC8693079 DOI: 10.1002/advs.202102381] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/20/2021] [Indexed: 05/03/2023]
Abstract
Trauma is the leading cause of death in individuals under 44 years of age. Thorax trauma (TxT) is strongly associated with trauma-related death, an unbalanced innate immune response, sepsis, acute respiratory distress syndrome, and multiple organ dysfunction. It is shown that different in vivo traumata, such as TxT or an in vitro polytrauma cytokine cocktail trigger secretion of small extracellular nanovesicles (sEVs) from endothelial cells with pro-inflammatory cargo. These sEVs transfer transcripts for ICAM-1, VCAM-1, E-selectin, and cytokines to systemically activate the endothelium, facilitate neutrophil-endothelium interactions, and destabilize barrier integrity. Inhibition of sEV-release after TxT in mice ameliorates local as well as systemic inflammation, neutrophil infiltration, and distant organ damage in kidneys (acute kidney injury, AKI). Vice versa, injection of TxT-plasma-sEVs into healthy animals is sufficient to trigger pulmonary and systemic inflammation as well as AKI. Accordingly, increased sEV concentrations and transfer of similar cargos are observed in polytrauma patients, suggesting a fundamental pathophysiological mechanism.
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Affiliation(s)
- Tanja Seibold
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Jonathan Schönfelder
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Florian Weeber
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - André Lechel
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Milena Armacki
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Mareike Waldenmaier
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Christoph Wille
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Annette Palmer
- Institute of Clinical and Experimental Trauma‐ImmunologyUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Rebecca Halbgebauer
- Institute of Clinical and Experimental Trauma‐ImmunologyUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Ebru Karasu
- Institute of Clinical and Experimental Trauma‐ImmunologyUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Markus Huber‐Lang
- Institute of Clinical and Experimental Trauma‐ImmunologyUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Miriam Kalbitz
- Department of TraumatologyHandPlastic and Reconstructive SurgeryUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Peter Radermacher
- Institute of Anesthesiological Pathophysiology and Process EngineeringUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Stephan Paschke
- Department of General and Visceral SurgeryUniversity HospitalAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Thomas Seufferlein
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
| | - Tim Eiseler
- Department of Internal Medicine IUniversity Hospital UlmAlbert‐Einstein‐Allee 23Ulm89081Germany
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13
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Okamura DM, Brewer CM, Wakenight P, Bahrami N, Bernardi K, Tran A, Olson J, Shi X, Yeh SY, Piliponsky A, Collins SJ, Nguyen ED, Timms AE, MacDonald JW, Bammler TK, Nelson BR, Millen KJ, Beier DR, Majesky MW. Spiny mice activate unique transcriptional programs after severe kidney injury regenerating organ function without fibrosis. iScience 2021; 24:103269. [PMID: 34849462 PMCID: PMC8609232 DOI: 10.1016/j.isci.2021.103269] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 09/02/2021] [Accepted: 10/12/2021] [Indexed: 12/13/2022] Open
Abstract
Fibrosis-driven solid organ failure is an enormous burden on global health. Spiny mice (Acomys) are terrestrial mammals that can regenerate severe skin wounds without scars to avoid predation. Whether spiny mice also regenerate internal organ injuries is unknown. Here, we show that despite equivalent acute obstructive or ischemic kidney injury, spiny mice fully regenerate nephron structure and organ function without fibrosis, whereas C57Bl/6 or CD1 mice progress to complete organ failure with extensive renal fibrosis. Two mechanisms for vertebrate regeneration have been proposed that emphasize either extrinsic (pro-regenerative macrophages) or intrinsic (surviving cells of the organ itself) controls. Comparative transcriptome analysis revealed that the Acomys genome appears poised at the time of injury to initiate regeneration by surviving kidney cells, whereas macrophage accumulation was not detected until about day 7. Thus, we provide evidence for rapid activation of a gene expression signature for regenerative wound healing in the spiny mouse kidney.
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Affiliation(s)
- Daryl M. Okamura
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Chris M. Brewer
- Department of Laboratory Medicine & Pathology, University of Washington, Seattle, WA 98195, USA
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Paul Wakenight
- Center for Integrated Brain Research, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Nadia Bahrami
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Kristina Bernardi
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Amy Tran
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Jill Olson
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Xiaogang Shi
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Szu-Ying Yeh
- Center for Integrated Brain Research, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Adrian Piliponsky
- Center for Immunity & Immunotherapies, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Sarah J. Collins
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Elizabeth D. Nguyen
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Andrew E. Timms
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - James W. MacDonald
- Department of Environmental & Occupational Health, University of Washington, Seattle, WA 98195, USA
| | - Theo K. Bammler
- Department of Environmental & Occupational Health, University of Washington, Seattle, WA 98195, USA
| | - Branden R. Nelson
- Center for Integrated Brain Research, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Kathleen J. Millen
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Center for Integrated Brain Research, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - David R. Beier
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
| | - Mark W. Majesky
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Department of Laboratory Medicine & Pathology, University of Washington, Seattle, WA 98195, USA
- Center for Developmental Biology & Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98105, USA
- Institute of Stem Cell & Regenerative Medicine, University of Washington, Seattle, WA 98195, USA
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14
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Rademaker MT, Pilbrow AP, Ellmers LJ, Palmer SC, Davidson T, Mbikou P, Scott NJA, Permina E, Charles CJ, Endre ZH, Richards AM. Acute Decompensated Heart Failure and the Kidney: Physiological, Histological and Transcriptomic Responses to Development and Recovery. J Am Heart Assoc 2021; 10:e021312. [PMID: 34533033 PMCID: PMC8649508 DOI: 10.1161/jaha.121.021312] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Acute decompensated heart failure (ADHF) is associated with deterioration in renal function-an important risk factor for poor outcomes. Whether ADHF results in permanent kidney damage/dysfunction is unknown. METHODS AND RESULTS We investigated for the first time the renal responses to the development of, and recovery from, ADHF using an ovine model. ADHF development induced pronounced hemodynamic changes, neurohormonal activation, and decline in renal function, including decreased urine, sodium and urea excretion, and creatinine clearance. Following ADHF recovery (25 days), creatinine clearance reductions persisted. Kidney biopsies taken during ADHF and following recovery showed widespread mesangial cell prominence, early mild acute tubular injury, and medullary/interstitial fibrosis. Renal transcriptomes identified altered expression of 270 genes following ADHF development and 631 genes following recovery. A total of 47 genes remained altered post-recovery. Pathway analysis suggested gene expression changes, driven by a network of inflammatory cytokines centered on IL-1β (interleukin 1β), lead to repression of reno-protective eNOS (endothelial nitric oxide synthase) signaling during ADHF development, and following recovery, activation of glomerulosclerosis and reno-protective pathways and repression of proinflammatory/fibrotic pathways. A total of 31 dysregulated genes encoding proteins detectable in urine, serum, and plasma identified potential candidate markers for kidney repair (including CNGA3 [cyclic nucleotide gated channel subunit alpha 3] and OIT3 [oncoprotein induced transcript 3]) or long-term renal impairment in ADHF (including ACTG2 [actin gamma 2, smooth muscle] and ANGPTL4 [angiopoietin like 4]). CONCLUSIONS In an ovine model, we provide the first direct evidence that an episode of ADHF leads to an immediate decline in kidney function that failed to fully resolve after ≈4 weeks and is associated with persistent functional/structural kidney injury. We identified molecular pathways underlying kidney injury and repair in ADHF and highlighted 31 novel candidate biomarkers for acute kidney injury in this setting.
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Affiliation(s)
- Miriam T Rademaker
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand
| | - Anna P Pilbrow
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand
| | - Leigh J Ellmers
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand
| | - Suetonia C Palmer
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand
| | - Trent Davidson
- Department of Anatomical Pathology Prince of Wales Hospital Sydney New South Wales Australia
| | - Prisca Mbikou
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand
| | - Nicola J A Scott
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand
| | - Elizabeth Permina
- Otago Genomics Facility Division of Health Sciences University of Otago Dunedin New Zealand
| | | | - Zoltán H Endre
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand.,Department of Nephrology Prince of Wales Hospital Sydney New South Wales Australia
| | - A Mark Richards
- Department of Medicine University of OtagoChristchurch Christchurch New Zealand.,Cardiovascular Research Institute National University of Singapore Singapore
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15
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Abstract
Epigenetics examines heritable changes in DNA and its associated proteins except mutations in gene sequence. Epigenetic regulation plays fundamental roles in kidney cell biology through the action of DNA methylation, chromatin modification via epigenetic regulators and non-coding RNA species. Kidney diseases, including acute kidney injury, chronic kidney disease, diabetic kidney disease and renal fibrosis are multistep processes associated with numerous molecular alterations even in individual kidney cells. Epigenetic alterations, including anomalous DNA methylation, aberrant histone alterations and changes of microRNA expression all contribute to kidney pathogenesis. These changes alter the genome-wide epigenetic signatures and disrupt essential pathways that protect renal cells from uncontrolled growth, apoptosis and development of other renal associated syndromes. Molecular changes impact cellular function within kidney cells and its microenvironment to drive and maintain disease phenotype. In this chapter, we briefly summarize epigenetic mechanisms in four kidney diseases including acute kidney injury, chronic kidney disease, diabetic kidney disease and renal fibrosis. We primarily focus on current knowledge about the genome-wide profiling of DNA methylation and histone modification, and epigenetic regulation on specific gene(s) in the pathophysiology of these diseases and the translational potential of identifying new biomarkers and treatment for prevention and therapy. Incorporating epigenomic testing into clinical research is essential to elucidate novel epigenetic biomarkers and develop precision medicine using emerging therapies.
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16
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Fluid management, electrolytes imbalance and renal management in neonates with neonatal encephalopathy treated with hypothermia. Semin Fetal Neonatal Med 2021; 26:101261. [PMID: 34140246 DOI: 10.1016/j.siny.2021.101261] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Kidney dysfunction and acute kidney injury (AKI) frequently accompanies neonatal encephalopathy and contributes to neonatal morbidity and mortality. While there are currently no proven therapies for the treatment of AKI, understanding the pathophysiology along with early recognition and treatment of alterations in fluid, electrolyte and metabolic homeostasis that accompany AKI offer opportunity to reduce associated morbidity. Promising new tests and technologies, including urine and serum biomarkers and renal near-infrared spectroscopy offer opportunities to improve diagnosis and monitoring of neonates at risk for kidney injury. Furthermore, recent advances in neonatal kidney supportive therapies such as hemofiltration and hemodialysis may further improve outcomes in this population. This chapter provides an overview of disorders of fluid balance, electrolyte homeostasis and kidney function associated with neonatal encephalopathy and therapeutic hypothermia. Recommendations for fluid and electrolyte management based upon published literature and authors' opinions are provided.
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17
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Viñas JL, Spence M, Porter CJ, Douvris A, Gutsol A, Zimpelmann JA, Campbell PA, Burns KD. micro-RNA-486-5p protects against kidney ischemic injury and modifies the apoptotic transcriptome in proximal tubules. Kidney Int 2021; 100:597-612. [PMID: 34181969 DOI: 10.1016/j.kint.2021.05.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 02/08/2023]
Abstract
Acute kidney injury (AKI) carries high morbidity and mortality, and effective treatments are lacking. Preclinical models support involvement of micro-RNAs (miRs) in AKI pathogenesis, although effects on the kidney transcriptome are unclear. We previously showed that injection of cord blood endothelial colony forming cell-derived exosomes, enriched in miR-486-5p, prevented ischemic AKI in mice. To further define this, we studied direct effects of miR-486-5p in mice with kidney ischemia-reperfusion injury. RNA-Seq was used to compare the impact of miR-486-5p and exosomes on the transcriptome of proximal tubules and kidney endothelial cells 24 hours after ischemia-reperfusion. In mice with AKI, injection of miR-486-5p mimic increased its levels in proximal tubules and endothelial cells, and improved plasma creatinine, histological injury, neutrophil infiltration, and apoptosis. Additionally, miR-486-5p inhibited expression of its target phosphatase and tensin homolog, and activated protein kinase B. In proximal tubules, miR-486-5p or exosomes reduced expression of genes associated with ischemic injury and the tumor necrosis factor (TNF) pathway, and altered distinct apoptotic genes. In endothelial cells, genes associated with metabolic processes were altered by miR-486-5p or exosomes, although TNF pathway genes were not affected. Thus, our results suggest that miR-486-5p may have therapeutic potential in AKI.
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Affiliation(s)
- Jose L Viñas
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Matthew Spence
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Christopher J Porter
- Ottawa Bioinformatics Core Facility, the Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Adrianna Douvris
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Alex Gutsol
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Joseph A Zimpelmann
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Pearl A Campbell
- Regenerative Medicine Program, the Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Kevin D Burns
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada.
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18
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Rumienczyk I, Kulecka M, Ostrowski J, Mar D, Bomsztyk K, Standage SW, Mikula M. Multi-Organ Transcriptome Dynamics in a Mouse Model of Cecal Ligation and Puncture-Induced Polymicrobial Sepsis. J Inflamm Res 2021; 14:2377-2388. [PMID: 34113146 PMCID: PMC8184233 DOI: 10.2147/jir.s307305] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/21/2021] [Indexed: 12/15/2022] Open
Abstract
PURPOSE During sepsis, an excessive inflammatory immune reaction contributes to multi-organ dysfunction syndrome (MODS), a critical condition associated with high morbidity and mortality; however, the molecular mechanisms driving MODS remain elusive. METHODS We used RNA sequencing to characterize transcriptional changes in the early phase of sepsis, at 6, 12, 24 hour time points in lung, kidney, liver, and heart tissues, in a cecal ligation and puncture (CLP)-induced polymicrobial sepsis murine model. RESULTS The CLP surgery induced significant changes (adj. p-value<0.05) in expression of hundreds of transcripts in the four organs tested, with the highest number exceeding 2,000 differentially expressed genes (DEGs) in all organs at 12 hours post-CLP. Over-representation analysis by functional annotations of DEGs to the Reactome database revealed the immune system, hemostasis, lipid metabolism, signal transduction, and extracellular matrix remodeling biological processes as significantly altered in at least two organs, while metabolism of proteins and RNA were revelaed as being liver tissue specific in the early phase of sepsis. CONCLUSION RNA sequencing across organs and time-points in the CLP murine model allowed us to study the trajectories of transcriptome changes demonstrating alterations common across multiple organs as well as biological pathways altered in an organ-specific manner. These findings could pave new directions in the research of sepsis-induced MODS and indicate new sepsis treatment strategies.
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Affiliation(s)
- Izabela Rumienczyk
- Maria Sklodowska-Curie National Research Institute of Oncology, Department of Genetics, Warsaw, 02-781, Poland
| | - Maria Kulecka
- Maria Sklodowska-Curie National Research Institute of Oncology, Department of Genetics, Warsaw, 02-781, Poland
- Centre for Postgraduate Medical Education, Department of Gastroenterology, Hepatology and Clinical Oncology, Warsaw, 01-813, Poland
| | - Jerzy Ostrowski
- Maria Sklodowska-Curie National Research Institute of Oncology, Department of Genetics, Warsaw, 02-781, Poland
- Centre for Postgraduate Medical Education, Department of Gastroenterology, Hepatology and Clinical Oncology, Warsaw, 01-813, Poland
| | - Daniel Mar
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
| | - Karol Bomsztyk
- UW Medicine South Lake Union, University of Washington, Seattle, WA, 98109, USA
| | - Stephen W Standage
- Division of Critical Care Medicine, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Michal Mikula
- Maria Sklodowska-Curie National Research Institute of Oncology, Department of Genetics, Warsaw, 02-781, Poland
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19
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Yang Y, Ge B, Liu Y, Feng J. The efficacy of biomarkers in the diagnosis of acute kidney injury secondary to liver cirrhosis. Medicine (Baltimore) 2021; 100:e25411. [PMID: 33832138 PMCID: PMC8036071 DOI: 10.1097/md.0000000000025411] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 01/19/2021] [Accepted: 02/08/2021] [Indexed: 01/05/2023] Open
Abstract
ABSTRACT This study is to investigate the role of neutrophil gelatinase-associated lipocalin (NGAL), cystatin C (CysC) and creatinine in the diagnosis of acute kidney injury (AKI) secondary to liver cirrhosis.A total of 825 patients (including 540 liver cirrhosis patients and 285 healthy controls) were enrolled. Liver cirrhosis patients were further subdivided into AKI secondary to liver cirrhosis group (AKI group, 210 patients) and simple liver cirrhosis group (LC group, 330 patients). Serum NGAL/urine NGAL (sNGAL/uNGAL), and serum creatinine (sCr) levels as well as estimated glomerular filtration rates were measured. The diagnostic performances of these indicators in AKI secondary to liver cirrhosis were evaluated.The levels of sNGAL, uNGAL, CysC and sCr in the AKI group were significantly higher than those of LC and healthy control groups. However, the eGFR and c-aGFR of AKI group were significantly lower. With the progression of AKI (AKI-S1→AKI-S2→AKI-S3), the levels of sNGAL, uNGAL, CysC and sCr increased gradually, while the levels of c-aGFR and eGFR decreased gradually. The sNGAL, uNGAL and CysC were positively correlated with sCr (r = 0.638, 0.635, and 0.650), but negatively correlated with c-aGFR (r = -0.617, -0.606 and -0.655). However, eGFR had a negative correlation with sCr (r = -0.711), but a positive correlation with c-aGFR (r = 0.736). ROC curve analysis showed that the area under the curve for uNGAL was the largest (0.976), followed by sNGAL (0.967). The diagnostic efficacy of uNGAL and sNGAL in AKI group were 0.907 and 0.870, and the risk degrees were OR = 54.524 and 5.115, respectively.NGAL might perform better than sCr and CysC in the diagnosis of AKI secondary to liver cirrhosis, while uNGAL might be a better indicator than sNGAL in AKI diagnosis.
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Affiliation(s)
- Yuwei Yang
- Department of Laboratory Medicine, Mianyang Central Hospital, Affiliated to Southwest Medical University, Mianyang
| | - Bin Ge
- Department of Laboratory Medicine, Pidu District People's Hospital, Chengdu, Sichuan, China
| | - Yan Liu
- Department of Laboratory Medicine, Pidu District People's Hospital, Chengdu, Sichuan, China
| | - Jiafu Feng
- Department of Laboratory Medicine, Mianyang Central Hospital, Affiliated to Southwest Medical University, Mianyang
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20
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Molecular pathways involved in injury-repair and ADPKD progression. Cell Signal 2020; 72:109648. [PMID: 32320858 DOI: 10.1016/j.cellsig.2020.109648] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 12/29/2022]
Abstract
The major hallmark of Autosomal Dominant Polycystic Kidney Disease (ADPKD) is the formation of many fluid-filled cysts in the kidneys, which ultimately impairs the normal renal structure and function, leading to end-stage renal disease (ESRD). A large body of evidence suggests that injury-repair mechanisms are part of ADPKD progression. Once cysts have been formed, proliferation and fluid secretion contribute to the cyst size increase, which eventually causes stress on the surrounding tissue resulting in local injury and fibrosis. In addition, renal injury can cause or accelerate cyst formation. In this review, we will describe the various mechanisms activated during renal injury and tissue repair and show how they largely overlap with the molecular mechanisms activated during PKD progression. In particular, we will discuss molecular mechanisms such as proliferation, inflammation, cell differentiation, cytokines and growth factors secretion, which are activated following the renal injury to allow the remodelling of the tissue and a proper organ repair. We will also underline how, in a context of PKD-related gene mutations, aberrant or chronic activation of these developmental pathways and repair/remodelling mechanisms results in exacerbation of the disease.
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21
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Soofi A, Kutschat AP, Azam M, Laszczyk AM, Dressler GR. Regeneration after acute kidney injury requires PTIP-mediated epigenetic modifications. JCI Insight 2020; 5:130204. [PMID: 31917689 DOI: 10.1172/jci.insight.130204] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 01/03/2020] [Indexed: 01/25/2023] Open
Abstract
A terminally differentiated cellular phenotype is thought to be maintained, at least in part, by both active and repressive histone marks. However, it is unclear whether regenerating cells after injury need to replicate such epigenetic marks to recover. To test whether renal epithelial cell regeneration is dependent on histone H3K4 methylation, we generated a mouse model that deleted the Paxip1 gene in mature renal proximal tubules. Paxip1 encodes PTIP, an essential protein in the Mll3/4 histone H3K4 methyltransferase complex. Mice with PTIP deletions in the adult kidney proximal tubules were viable and fertile. Upon acute kidney injury, such mice failed to regenerate damaged tubules, leading to scarring and interstitial fibrosis. The inability to repair damage was likely due to a failure to reenter mitosis and reactivate regulatory genes such as Sox9. PTIP deletion reduced histone H3K4 methylation in uninjured adult kidneys but did not significantly affect function or the expression of epithelial specific markers. Strikingly, cell lineage tracing revealed that surviving PTIP mutant cells could alter their phenotype and lose epithelial markers. These data demonstrate that PTIP and associated MLL3/4-mediated histone methylation are needed for regenerating proximal tubules and to maintain or reestablish the cellular epithelial phenotype.
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do Valle Duraes F, Lafont A, Beibel M, Martin K, Darribat K, Cuttat R, Waldt A, Naumann U, Wieczorek G, Gaulis S, Pfister S, Mertz KD, Li J, Roma G, Warncke M. Immune cell landscaping reveals a protective role for regulatory T cells during kidney injury and fibrosis. JCI Insight 2020; 5:130651. [PMID: 32051345 DOI: 10.1172/jci.insight.130651] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 01/15/2020] [Indexed: 12/30/2022] Open
Abstract
Acute kidney injury (AKI) and chronic kidney diseases are associated with high mortality and morbidity. Although the underlying mechanisms determining the transition from acute to chronic injury are not completely understood, immune-mediated processes are critical in renal injury. We have performed a comparison of 2 mouse models leading to either kidney regeneration or fibrosis. Using global gene expression profiling we could identify immune-related pathways accounting for the majority of the observed transcriptional changes during fibrosis. Unbiased examination of the immune cell composition, using single-cell RNA sequencing, revealed major changes in tissue-resident macrophages and T cells. Following injury, there was a marked increase in tissue-resident IL-33R+ and IL-2Ra+ regulatory T cells (Tregs). Expansion of this population before injury protected the kidney from injury and fibrosis. Transcriptional profiling of Tregs showed a differential upregulation of regenerative and proangiogenic pathways during regeneration, whereas in the fibrotic environment they expressed markers of hyperactivation and fibrosis. Our data point to a hitherto underappreciated plasticity in Treg function within the same tissue, dictated by environmental cues. Overall, we provide a detailed cellular and molecular characterization of the immunological changes during kidney injury, regeneration, and fibrosis.
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Affiliation(s)
| | - Armelle Lafont
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Martin Beibel
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Kea Martin
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Katy Darribat
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Rachel Cuttat
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Annick Waldt
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Ulrike Naumann
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | | | - Swann Gaulis
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Sabina Pfister
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Kirsten D Mertz
- Institute of Pathology, Cantonal Hospital Baselland, Liestal, Switzerland
| | - Jianping Li
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Guglielmo Roma
- Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Max Warncke
- Novartis Institutes for Biomedical Research, Basel, Switzerland
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Abstract
Acute kidney injury (AKI) is defined by a rapid increase in serum creatinine, decrease in urine output, or both. AKI occurs in approximately 10-15% of patients admitted to hospital, while its incidence in intensive care has been reported in more than 50% of patients. Kidney dysfunction or damage can occur over a longer period or follow AKI in a continuum with acute and chronic kidney disease. Biomarkers of kidney injury or stress are new tools for risk assessment and could possibly guide therapy. AKI is not a single disease but rather a loose collection of syndromes as diverse as sepsis, cardiorenal syndrome, and urinary tract obstruction. The approach to a patient with AKI depends on the clinical context and can also vary by resource availability. Although the effectiveness of several widely applied treatments is still controversial, evidence for several interventions, especially when used together, has increased over the past decade.
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Affiliation(s)
- Claudio Ronco
- Department of Medicine, University of Padova, Padova, Italy; International Renal Research Institute of Vicenza, Vicenza, Italy; Department of Nephrology, San Bortolo Hospital, Vicenza, Italy.
| | - Rinaldo Bellomo
- Critical Care Department, Austin Hospital, Melbourne, VIC, Australia
| | - John A Kellum
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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24
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Bomsztyk K, Mar D, Wang Y, Denisenko O, Ware C, Frazar CD, Blattler A, Maxwell AD, MacConaghy BE, Matula TJ. PIXUL-ChIP: integrated high-throughput sample preparation and analytical platform for epigenetic studies. Nucleic Acids Res 2019; 47:e69. [PMID: 30927002 PMCID: PMC6614803 DOI: 10.1093/nar/gkz222] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 12/25/2022] Open
Abstract
Chromatin immunoprecipitation (ChIP) is the most widely used approach for identification of genome-associated proteins and their modifications. We have previously introduced a microplate-based ChIP platform, Matrix ChIP, where the entire ChIP procedure is done on the same plate without sample transfers. Compared to conventional ChIP protocols, the Matrix ChIP assay is faster and has increased throughput. However, even with microplate ChIP assays, sample preparation and chromatin fragmentation (which is required to map genomic locations) remains a major bottleneck. We have developed a novel technology (termed 'PIXUL') utilizing an array of ultrasound transducers for simultaneous shearing of samples in standard 96-well microplates. We integrated PIXUL with Matrix ChIP ('PIXUL-ChIP'), that allows for fast, reproducible, low-cost and high-throughput sample preparation and ChIP analysis of 96 samples (cell culture or tissues) in one day. Further, we demonstrated that chromatin prepared using PIXUL can be used in an existing ChIP-seq workflow. Thus, the high-throughput capacity of PIXUL-ChIP provides the means to carry out ChIP-qPCR or ChIP-seq experiments involving dozens of samples. Given the complexity of epigenetic processes, the use of PIXUL-ChIP will advance our understanding of these processes in health and disease, as well as facilitate screening of epigenetic drugs.
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Affiliation(s)
- Karol Bomsztyk
- UW Medicine South Lake Union, University of Washington, Seattle, WA 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
- To whom correspondence should be addressed. Tel. +1 206 616 7949;
| | - Daniel Mar
- UW Medicine South Lake Union, University of Washington, Seattle, WA 98109, USA
| | - Yuliang Wang
- UW Medicine South Lake Union, University of Washington, Seattle, WA 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
- Paul G. Allen School of Computer Science & Engineering, University of Washington, Seattle, WA 98195, USA
| | - Oleg Denisenko
- UW Medicine South Lake Union, University of Washington, Seattle, WA 98109, USA
| | - Carol Ware
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - Christian D Frazar
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | | | - Adam D Maxwell
- Department of Urology, University of Washington School of Medicine, Seattle, WA 98195, USA
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, WA 98195, USA
| | - Brian E MacConaghy
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, WA 98195, USA
| | - Thomas J Matula
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, WA 98195, USA
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